feat(home): Because you listened recommendation rail (#489)

* feat(home): "Because you listened" recommendation rail

New Home rail (under Recently Added, default on, toggleable in Settings →
Personalisation → Home Page) that surfaces 3 albums from artists similar
to one of your top-played artists. Anchor rotates per Home mount so a
different top-artist seeds the recommendations each visit; within each
anchor, both the similar-artist subset and the chosen album per artist
are randomised, so the same anchor returns different picks on subsequent
visits.

Card layout matches the regular Album cards' surface (--bg-card with
accent-tinted border + 1px inset top highlight) and gets the same
Play / Enqueue hover overlay buttons. Cover and meta scale via CSS only
— no infinite animations, no filter/blur/transform, no compositing
layers. Grid wraps below 3-up at <400px card width instead of shrinking.

API budget: one getArtistInfo2 + 6 parallel getArtist calls per Home
mount, both reusing the existing mostPlayed payload to derive the anchor
pool (no extra API call to find top artists). All 8 locales seeded.

* fix(home): ru plurals + per-server anchor + narrower card grid

- ru: add _few / _many for becauseYouLikeTracks (CLDR Russian needs
  4 forms — 3 треков was wrong, now 3 трека).
- Anchor rotation memory is now per-server. The localStorage key
  becomes psysonic_because_anchor:<serverId>; switching servers no
  longer aliases server A's rotation onto server B's pool.
- because-card grid minmax(400px, 1fr) -> minmax(340px, 1fr) so two
  cards fit side by side at typical sidebar-expanded widths instead
  of collapsing to a single card per row.

* docs: CHANGELOG + Contributors entry for Because-you-listened rail (PR #489)

* style(home): blurred cover backdrop + centred layout for Because-cards

- Each Because-card renders the album cover as a blurred, low-opacity
  full-bleed background layer behind the existing cover thumb and text.
  Resolved through useCachedUrl so the cache layer feeds it (same key
  as the thumbnail) instead of a fresh salted URL on every render.
- Card content (cover thumb + text block) now centred horizontally and
  vertically within the card; the meta line lives in a small pill that
  sits centred under the artist row.
- Text contrast halo and meta-pill background are theme-aware via
  color-mix on var(--bg-card) / var(--text-primary), so the same rules
  read on dark and light themes (was hard-coded rgba black before and
  smudged the type on Latte / Nord Snowstorm).

src/pages/Home.tsx

@@ -2,6 +2,7 @@ import React, { useEffect, useState } from 'react';
 import Hero from '../components/Hero';
 import AlbumRow from '../components/AlbumRow';
 import SongRail from '../components/SongRail';
+import BecauseYouLikeRail from '../components/BecauseYouLikeRail';
 import { getAlbumList, getArtists, getRandomSongs, SubsonicAlbum, SubsonicArtist, SubsonicSong } from '../api/subsonic';
 import { useTranslation } from 'react-i18next';
 import { NavLink, useNavigate } from 'react-router-dom';
@@ -167,6 +168,12 @@ export default function Home() {
     isVisible('mostPlayed') &&
     mostPlayed.length > 0 &&
     reserveArtworkRow();
+  const becauseYouLikeArtworkEnabled =
+    !homeRailArtworkDisabled &&
+    !homeAlbumRowsDisabled &&
+    isVisible('becauseYouLike') &&
+    mostPlayed.length > 0 &&
+    reserveArtworkRow();
 
   const homeLiteArtworkFx = perfFlags.disableHomeArtworkFx;
   const homeFlatArtworkClip = perfFlags.disableHomeArtworkClip;
@@ -194,6 +201,12 @@ export default function Home() {
                 initialArtworkBudget={HOME_ALBUM_ROW_INITIAL_ARTWORK_BUDGET}
               />
             )}
+            {!homeAlbumRowsDisabled && isVisible('becauseYouLike') && mostPlayed.length > 0 && (
+              <BecauseYouLikeRail
+                mostPlayed={mostPlayed}
+                disableArtwork={!becauseYouLikeArtworkEnabled}
+              />
+            )}
             {!homeAlbumRowsDisabled && isVisible('discover') && (
               <AlbumRow
                 title={t('home.discover')}